GATE XE 2019 XE-B Q15: External Flows

For steady laminar flow at zero incidence over a flat plate, the component of velocity parallel to the plate in the boundary layer is given by

, where

is the distance measured normal to the flat plate. If

is the coefficient of dynamic viscosity,

is the velocity parallel to the wall at the edge of the boundary layer and

is the boundary layer thickness, the wall shear stress is given by

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